chore: create a drafted release when tagging a commit

Author: ym

.github/workflows/build.yml

@@ -1,12 +1,18 @@
 name: Build firmware
+permissions:
+  contents: write
+
 on:
   push:
     branches:
       - dev
+      - chore/release
+    tags:
+      - 'v*'
 
 jobs:
   build:
-    runs-on: buildjet-16vcpu-ubuntu-2204 
+    runs-on: buildjet-16vcpu-ubuntu-2204
     name: Build
     steps:
       - name: Checkout
@@ -40,10 +46,49 @@ jobs:
         with:
           name: OTA Image
           path: output/image/update_ota.tar
-          retention-days: 30
+          retention-days: 7
       - name: Upload Full image
         uses: actions/upload-artifact@v4
         with:
           name: Full Image
           path: output/image/update.img
-          retention-days: 30
+          retention-days: 7
+      - name: Create compressed buildkit
+        run: |
+          tar  "-I zstd -10 -T0 --long=31" -cf \
+            buildkit.tar.zst \
+            tools/linux/toolchain \
+            media/out/include \
+            media/out/lib
+      - name: Upload buildkit
+        uses: actions/upload-artifact@v4
+        with:
+          name: jetkvm-native-buildkit
+          path: buildkit.tar.zst
+          retention-days: 7
+          compression-level: 0
+
+  release:
+    # no need to use buildjet runners, as we only need to create a release
+    runs-on: ubuntu-latest
+    name: Release
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+      - name: Draft release
+        uses: softprops/action-gh-release@v2
+        with:
+          # need review before making a real release
+          draft: true
+          files: |
+            ./OTA Image/update_ota.tar
+            ./Full Image/update.img
+            ./jetkvm-native-buildkit/buildkit.tar.zst
+          fail_on_unmatched_files: true
+          tag_name: ${{ github.ref }}
+          name: ${{ github.ref }}
+          generate_release_notes: true